Line-stop mechanism for type-writers.



c H GILL LINE STOP MECHANISM FOR TYPE WRITERS.

APPLIGATION FILED EPT.12, 1910.

Patented July 4, 1911.

3 SHEETSSHEET l.

v k m mw m Mjnzess 1 G. H. GILL.

LIN-E STOP MECHANISM FOR TYPE WRITERS.

APPLICATION FILEDSEPT. 12; 1910. I

Patented July 4, 1911.

3 SHEETS-SHEET 2.

29 W4 fi H o. H. GILL. LINE STOP MECHANISM FOR TYPE WRITERS. I

' APP LIOATION FILED SEPT. 12 1910.

996,638, Patented Ju1 4, 1911.

3 SHEETBS HEET 3.

UNITE s'rnrns PATENT FFICE.

CHARLES H. GILL, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MONARCH TYPEWRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

LINE-STOP MECHANISM FOR TYPE-WRITERS.

Specification of Letters Patent.

Patented July 4, 1911.

Application filed September 12, 1910. Serial No. 581,562.

To all whom it may concern Be it known that I, CHARLES H. GILL, a citizen of the United States of America, and a resident of Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Line-Stop Mechanisms for Type-VVriters, of which the following is a specification.

The main objects of this invention are to provide an improved form of line stop mechanism for limiting the travel of the carriages of typewriting machines; to provide improved mechanism for limiting the return of the typewriter carriage to the right, for determining the width of the normal lefthand margin on the paper written upon; to provide means for automatically releasing the stop mechanism when the pressure which caused the return of the carriage is relieved, so that a mere repetition of such pressure will be suflicient cause forfurther movement of the carriage; to provide improved means for resetting said stop mechanism when the carriage moves in the opposite direction; to provide improved line stop mechanism for determining the righthand margin on the paper written upon and adapted to be re leased automatically by the normal operation of the type keys, without the use of special margin release keys.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts and combinations of devices to be set-forth in the following specification and pointed out in the appended claims An illustrative embodiment of this. invention is shown in the aceompanyng drawings, in which Figure 1 is a fragmentary top plan of a typewriter equipped with a specific form of line stop mechanism constructed according to this invention. Fig.2 is a sectional elevation, takenon the line -A-A of Fig. 1,

and showing the lefthand line stop mechanism. Fig. 3 is air-enlarged fragmentary detail in plan illustrating the method of mounting the key lever lockingbarof the righthand margin stop mechanism. Figs. 4 and 5 are enlarged fragmentary'details,

illustrating different positions of the locking bar with respect to the key levers. Fig. 6

is a fragmentary front elevation correspond ing to Fig. 1. Figs. 7 and 8 are enlarged fragmentary details, respectively in plan and elevation of some of the coacting parts of the righthand margin stop mechanism. Fig. 9 is a plan view of the parts shown in Figs. 7 and 8, illustrating how one of the stops retracts to avoid conflict with the other when the carriage is returned to its starting position. Fig. 10 is an enlarged detail, partly sectional, illustrating the arrangement of the left margin stop mechanism which limits the movement of the carriage to the right. Fig. 11 is an enlarged front View of the same, as viewed from the plane of the line BB of Fig. 10, showing the stop retracted, and the shoulder on the carriage in such position that a further movement of the carriage to the left will cause it to reset the stop. Fig. 12 is asectional detail of the parts shown in Fig. 11, the section being taken on the line CC of Fig. 11.. Fig. 13 is a view showing the stop reset, so as to engage the shoulder on the frame.

The typewriting machine shown in the drawings is of usual form, but the carriage escapement mechanism is shown somewhat diagrammatically, in order to simplify the drawings, and the marginal stops are so designed as to require but a light modification of usual typewriter construction. The lefthand margin stop mechanism comprises coacting parts on the carriage and the frame, which limit the return movement of the carriage at its normal margin, but after having eration of the type keys.

In the construction showni in the drawings, the carriage 1, on which the platen roller 2 is journaled, i s'mounted to travel back and forth on the frame 3 in the usual manner. A plurality of type bars 4 are mounted in the frame 3 in the usual manner,

and connected to their respective type key levers5, which are arranged to operate the the machine are shown in the usual escapement mechanism 6, for causing a step by step advancement of the carriage as it is urged in the lefthand direction by the spring drum mechanism 7. The clutch mechanism 6 permits the free movement of the carriage in the righthand direction. These parts of drawings somewhat diagrammatically, as their'specific construction forms no part of the present invention.

The margin stop mechanism which limits the return movement of the carriage to the right to determine the left-hand margin on the paper comprises a pin, stop or shoulder 8 fixed on the carriage and a pivoted stop 9.

The shoulder 8' is carried by a depending a member 14. The

he set to arrest the movement armlO fixed on the-carriage l, and the stop 9 is pivot'ally mounted'on a block 11, which in turn is horizontally slidable in a slot 12 formed in the depending flange 13 on the righthand end of the stop 9 has a part 15 terminating in :1, lug 16, which coacts with the shoulder 8to prevent the complete retraction of the stop 9 until the carriage is moved so as to shift the shoulder 8 out of engagement therewith.

The opposite end of the stop 9 has an inclined part17, with which the shoulder coacts to reset the stop 9. A spring 18 is attaehed to the flange 13 and normally arrangcdto bear on the stop 9 at' a point about. midway between the limits of movement of the block 11 in the slot 12, and thus actsv to tip the stop 9 in either direction, according to the position of the block 11 in the slot-12. Pins 19 and 20 are positioned on thefiange 13to limit the action of the spring18 upon the stop 9.- The member 14 is slidably mounted onthc rod 21, which extends across the front part of the frame 3, parallel with thetravel of the carriage 1, and has a detent 22 pivoted thereto, the outer end of which engages the notches 23 in the rod 2 1-, so thatthe line stop mechanism can of the'carriage at any desired point. i

The righthand margin line stop mecha-' nism limits the movement of the carriage to the left and comprises a rod 25 extending across the typewriter above the key levers 5, and carried by arms 26, whicharepivot-- ally conncctcd to links 27, pivoted on the stud shafts 28. The rod 25 is adapted to be shifted vforwardl hooks 29, integral y formed on the key levers Sandterminating in-theshoulder 30, so that Whena key lever is depressed, the rod 25 isurged downwardly until the links 27 abut against the pins 31.

The shifting mechanism for movlng the rod vinto position to engage the hooks 29 comprises a lever 32, carried by a bar 33 mounted on the rod 21, which is adapted to be swung forwardly by the engagement of under the upstanding 7 the shoulder 34 and the stop der 3 1 is formed on the member 36, and has an inclined face 37 which constitutes a cam with which the stop 35 cooperates. The stop 35 is pivotally mounted on the carriage 1,

and normally urged by the spring 38 into the path of the stop 34, the action of which spring is limited by the pin 39. The under faceofthe stop 35 is tapered to form the narrow shoulder 35' so that it will engage the shoulder 3 1 during only apart of'the' movement of the carriage through one space, and the tapered part tends to shift the stop 35 slightly on its of the'lever 32 to its'normal position Without further movement of the carriage. The stop 35also liasan inclined face 10, which coaets with the vertical face of the shoulder 34, so-as to swing the stop out'otthe path ofthe shoulder 34. as the carriage 1 is returned to itsstarting position. The member 36 1nay be shifted along torod21 so that the shoulders 34 and 35 will enterinto engage ment for operatingthe line stop mechanism at any desired point, and the member 36 may be locked in that position by the engage iuent of the usual detent SG with the teeth 41 on the bar 33. The rod 25'is'normally The shoulpivot to insure the return.

urged out of position for engagement with 39 by means of spr ings42, conand to the arms 26, act-loin of the springs the hooks nected to the frame and pins limit the 42, so as to insure the'properbreaking of the joint between thearms-26and links 27.

A spring- H normally, urges the bar 33 so as to 'briugthe shoulder 34 into-position to engage with the stop 35.

The contact of theshoulders34and 35 is i only longenough to insure that the rod 25 will be shifted forwardly under the hooks 29, where it is hcld insuch position by the latch or detcnt 4.3,which' is'normally urged i 'levcr 32 is shifted toward thetront'of the machine, so asto bring the rod 25underthe tained by the detent 45 "(Fig 4) keys are locked, re'leases the-carriage in the usual Way, and causesit to be advaneed one ders 34 and 35 passinto and out-of engagement, and allow the spring tt to return the lever 32 to its normal position. Vheu the operator strikes the next key lever 5, its hook 29 engages the bar 25, and its stroke is shortened, being limited by the abutting of gageswith the shoulder84, whereupon the hooks 29 on the key levers whe're'it is re- 'The operation ofthekey lever -j ust'before the type space. During this movement, the shoul-' the link 27 against the pin 31. This looks the carriage by preventing suflicient movement of the key levers to operate the escapement, and serves as asignal to the operator that the normal margin for which the member 36 was set has been reached. As the key lever moves down, it carries the rod 25 out of engagement with the detent 45, and the springs 42 urge it rearwardly, but it is prevented ,from escaping from the hooks through contact with the shoulder 30 (Fig. 5). The release of the key lever lifts the hook 29, and permits the springs 42 to urge the rod 25 to its normal position, after which the key levers can then be given their full stroke, and the writing operation continued until the carriage reaches the extreme limit of its travel. It is thus seen that the line stop is withdrawn automatically, and all that the operator needs to do to continue the writing beyond the marginis to again strike the key lever which signaled the arrival of the carriage at the margin and release the locking mechanism. VVhen the writing of a line has been completed, the operator pushes the carriage to the right, in the usual way, until stopped by the lefthand margin stop. This movement is limited by the shifting of the block 11 to the righthand limit of its movement, through the engagement of the shoulder 8 with the stop 9. When the stop 9 is so shifted, the spring 18, bearing upon the stop at a point at the left of its pivot, forces the righthand end down. The shoulder 16 abuts against the shoulder 8, and prevents the parts from passing out of engagementuntil the pressure on the carriage is relieved, which allows it to move slightly to the left, due to clutch member 6 slipping into interlocking engagement, whereupon the shoulder 8 recedes from the shoulder 16 on the stop 9, and the stop swings down against the pin 20. The carriage is then in position to begin the writing operation at the normal margin, unless the operator desires to write to the left of the margin. To do this, it is only necessary to push the carriage farther to the rightafter once releasing it. As the carriage there after travels to the left during the normal operation of the type keys, the stop 8 again engages with the stop 9, and coacts with the inclined face 17 at the left end thereof, so as to shift the block 11 to the opposite limit of its movement, whereupon the spring 18 swings the righthand endof the stop upwardly mto position to again engage with the stop 8, when the carriage is returned to the starting point.

Although but one specific embodiment of v this inventionis herein shown and described,

it will be understood that numerous details of the construction shown may be altered or omitted without departingfrom the spirit of this invention as defined by the following claims.

1. In a typewriting machine, the combination of a frame, a carriage mounted to travel back and forth thereon, a stop onsaid carriage, a stop on said frame located to engage said carriage stop tolimit the movement of said carriage in one direction, and

means automatically actuated through the engagement of said stops forretracting one of said stops to allow a further movement of said carriage.

2. In a typewriting machine, the combination of a frame, a carriage mounted to travel back and forth thereon, a stop on said carriage, a stop on said frame located toengage said carriage stop to limit the movement of said carriage in one direction,

means automatically actuated through the engagement of said stops for retracting one of said stops to allow a further movement of said carriage, and means for resetting said stop through a return movement of the carriage.

3. In a typewriting machine, the combination of a frame, a carriage mounted to travel back and forth thereon, a shoulder on said carriage, a stop shiftably mounted on said frame and adapted through engage ment with said shoulder to be shifted thereby to a position wherein it will stop the movement of said carriage,-and means actuated through the shifting of said stop for automatically retracting it after it has stopped the carriage, andthereby allowing a further movement of the carriage in the same direction.

4. In a typewriting machine, the combination of a frame, a carriage mountedto travel back and forth thereon, a part mount.- ed to move between limits on said frame, a stop pivotally mounted on said part, resili' ent means engaging said stop and adapted to urge itin opposite directions when said part is shifted to opposite limits of its travel, a. shoulder on said carriage adapted to 'coaet with said stop for shifting the same to one limit of, its movement for limiting the movement of said "carriage and permit; ting said resilient means to retract said stop so as to allow a further movement "of said carriage.

5. In a. typewriting nation of a frame, 'a arriage mounted to travel back and forth'lhereofi, a part shiftably mounted on said frame, a stop pivotally mounted on said part, a'spring hearing on saidstop at a. point intermediate of the limit of travel of said part, for urging said stop in respectively opposite directions, a shoulder on said carriage adapted to coactwith said first stop for shifting the same to a position for limiting the movement of machine, the combi- &

said carriage in one direction and permitting said spring to retract said stop to allow a further movement of'said carriage, said shoulder being adapted to resetsaid stop when said carriage travels in the opposite direction.

6. In a typcwriting machine, the eombi' nation of a frame, a carriage mounted to travel back and forth thereon, a shoulder on said carriage, a stop pivotally mounted on said frame and adapted to coac't with said shoulder for limiting the movement of said carriage in one direction, means for retracting said stop after engagement with said shoulder to allow a further movement of said carriage,"and an inclined surface on said" stop adapted'to coact with said sl1oul der' for resetting said stop when said carriage moves in the opposite direction.

7; In a ty'pewriting machine, the combination of a frame, a carriage mounted to travel back and forth thereon, a plurality of type bars, type key levers operatively connected to said type bars, mechanism for. advancing said carriage in one direction by the operation of said type key levers, a'hook on cachjofsaid said'typekey levers, a member shittably mounted on said frame and normally' urged'out of the path of said hooks, a lever mechanism adapted to shiftsaid memberinto the pathot' said hooks, coacting shoulders on said lever mechanism and said. carriage, adapted to actuate said lever 'm'echanism when said carriage reaches a predetermined point in its travel, and adetent adapted to hold said member inthe path of said hooks for limiting the stroke of said levers, said detcnt being arranged to be released'from said member when one of said levers is depressed. U v

Splnfa typewriting machine, the combiuat" travelback and forth thereon, a plurality of type bars, type key levers operativcly co'nnected' to said type bars, mechanism for advancingisaid carriage-in one direction by the operation of sai'd type key levers, af hook on feach'of said type 'key levers, a member shiftablymotmt-ed on said frame andlnormally urged out of thepath ofsaid h'ooks, a lever mechanism 'adaptedto shit't said memberf'int'd the pathof said hooks, coacting shoulders on said lever mechanism and said carriage, adapted to actuate said lever mechanism when said'carriagc reaches a,

predct'crn'iinml point inits travel, a detent adapted to hold said member in thepath of said hooks for limiting the stroke of said levers, said detent being arranged to be released from'said member when one of said levers is depressed, and a shoulder on each of said hooks adapted to engage said menihcr after its release fromsmd detent toprevent the disengagement of said member and eluding automatically ion of'a frame, a carriage mounted to hook until said type key lever assumes its normal position. 1

9. In a typewriting machine, the combination of a carriage; and margin stop mechanism operative to arrest the carriage at the same predetermined point each time said carriage is returned to begin a new line of writing, said margin stopvmechanism including automatically operating means for rendering said margin stop. mechanism ineffective to arrest the carriageat said predetermined point when the pressurewhich caused said. returnmovement is relieved, thus enabling a further movement of the carriage beyond said predetermined point to be effected by a mere renewal of such pressure. v f v, 10. In a t-y pewriting machine, the combinationot a carria'ge;,and marginstop mechanism normally operative to arrest the carriage at the same predeterminedpoint each time it is returned tobegina new line of writing, said margin-stop mechanism including automatically operating, means for ali'ording a return movement of: the carriage beyond said predetermined point when desired and, for.automatically reestablishing a normal relation between the parts of the margin stop mechanism by a movementiof the carriage in the o p osite direction so that said nua-hanismis etiiectiveto,arrest'the carriage at saidpredetermined point at thenext return movement of the carriage to begin a new line. H I 1 l 11, In'a typewriting machine, t-he,'combination, of acarriage, and margin stop mechanism normally operative to arrest the carriage at the same dpre -oleterminedvpoint each time it is returne to; begin anewline of writing, said margin stop mechanisminoperating means effectivc to first arrest the carriage at saidpredetermined point; and then-afford a con tinued movement of the carriage beyond said predetermined point if desired and to autonmtically re'stablisha normal relation between the parts bya movement of the carriagein the direction ofitsstep-bystep feed so that said mechanism is effective-toagain arrest'the carriage at said predetermined point at the next return movement of the carriage-., 12. Infa typewritingimachine the combi nation of a travelingcarriage, means for a r-- resting said carriage at a given normal margi'nal point oneachofits return movements to begln a new line, means act ng automatn cally each tune the carriage lsarrested bys'aid arrcstingvmeans to throwsa'id arresting meansjout of'operation so that, bye mere renewal of. pressure on the carriage, said carriage can be moved beyond its normal marginal position, and means, acting automatically ateach operation of the above recited means, to resgcre said arresting means of thc carriage by a mere renev val of such 10 to its normal operative condition. pressure.

13. In ,a typewriting machine, the'combi- Signed at Chicago this 3rd day of Sepnation of a'carriage, means for arresting the tcmber 1910.-

return of the carriage at the same point each 1 CHARLES G time, and means for automatically releasing the-said arresting means when the pressure WVit-nesses: which caused the return of the carnage 1s re- EUGENE A. RUMMLER,

'lieved, thus enabling a further movement, MARY M. DILLMAN. 

